Model comparison

C4ai Aya Expanse 8b vs Phi-4 Mini

C4ai Aya Expanse 8b is the stronger model overall, scoring 34.3 to 30.4 on the Noometry Index.

Last verified October 10, 2026. 1 shared benchmarks.

C4ai Aya Expanse 8b

Cohere

34.3

Rank #227 Confirmed

Phi-4 Mini

Microsoft

30.4

Rank #280 Reported

Summary

They share 1 benchmark with published results for both. C4ai Aya Expanse 8b scores higher in 2 categories and Phi-4 Mini in 1 category; 2 gaps are clear of the uncertainty.
The widest gap is in knowledge, where C4ai Aya Expanse 8b leads 33.0 to 24.8.
The biggest single-benchmark swing is Vectara Hallucination Rate: 9.5% for C4ai Aya Expanse 8b and 23.5% for Phi-4 Mini.
Phi-4 Mini accepts more context: 128K tokens versus 8K.

Side by side

C4ai Aya Expanse 8b and Phi-4 Mini specifications
	C4ai Aya Expanse 8b	Phi-4 Mini
Provider	Cohere	Microsoft
Noometry Index	34.3	30.4
Released	2024-10-24	2024-12-11
Weights	Open	Open
Context window	8K	128K
Max output	4K	4K
Input $ / M tokens	—	$0.075
Output $ / M tokens	—	$0.30
Results tracked	15	3

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Category by category

Coding C4ai Aya Expanse 8b leads

C4ai Aya Expanse 8b: 33.2 (#252), Phi-4 Mini: 27.6 (#312)

Coding benchmarks
Benchmark	C4ai Aya Expanse 8b	Phi-4 Mini
SciCode	—	10.8%
LMArena Coding	1161	—

Reasoning Too close to call

C4ai Aya Expanse 8b: 21.4 (#198), Phi-4 Mini: 21.7 (#190)

Reasoning benchmarks
Benchmark	C4ai Aya Expanse 8b	Phi-4 Mini
CritPt	—	0%
LMArena Hard Prompts	1156	—

Math Not comparable

C4ai Aya Expanse 8b: 30.8 (#204), Phi-4 Mini: —

Math benchmarks
Benchmark	C4ai Aya Expanse 8b	Phi-4 Mini
LMArena Math	1168	—

Knowledge C4ai Aya Expanse 8b leads

C4ai Aya Expanse 8b: 33.0 (#197), Phi-4 Mini: 24.8 (#261)

Knowledge benchmarks
Benchmark	C4ai Aya Expanse 8b	Phi-4 Mini
Vectara Hallucination Rate	9.5%	23.5%
LMArena Expert	1153	—

Multilingual Not comparable

C4ai Aya Expanse 8b: 36.3 (#237), Phi-4 Mini: —

Multilingual benchmarks
Benchmark	C4ai Aya Expanse 8b	Phi-4 Mini
LMArena Non-English	1180	—
LMArena Chinese	1181	—
LMArena German	1188	—
LMArena Japanese	1120	—
LMArena Russian	1197	—

Instruction Following Not comparable

C4ai Aya Expanse 8b: 60.4 (#248), Phi-4 Mini: —

Instruction Following benchmarks
Benchmark	C4ai Aya Expanse 8b	Phi-4 Mini
LMArena Instruction Following	1155	—

Long Context Not comparable

C4ai Aya Expanse 8b: 36.1 (#231), Phi-4 Mini: —

Long Context benchmarks
Benchmark	C4ai Aya Expanse 8b	Phi-4 Mini
LMArena Longer Query	1192	—

Writing & Preference Not comparable

C4ai Aya Expanse 8b: 39.2 (#245), Phi-4 Mini: —

Writing & Preference benchmarks
Benchmark	C4ai Aya Expanse 8b	Phi-4 Mini
LMArena Text	1185	—
LMArena Creative Writing	1168	—
LMArena Multi-Turn	1160	—

Frequently asked questions

Is C4ai Aya Expanse 8b better than Phi-4 Mini?

C4ai Aya Expanse 8b is the stronger model overall, scoring 34.3 to 30.4 on the Noometry Index.

Is C4ai Aya Expanse 8b or Phi-4 Mini better for coding?

C4ai Aya Expanse 8b scores higher on coding benchmarks: 33.2 versus 27.6 in the Noometry coding category.

Which has the bigger context window?

Phi-4 Mini does, with 128K tokens against 8K.

How many benchmarks do C4ai Aya Expanse 8b and Phi-4 Mini share?

1 benchmark has published results for both models. C4ai Aya Expanse 8b has 15 scored results on Noometry and Phi-4 Mini has 3.